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tstrs gutem' Leners Patent No. 78,909, assimile 16,1868.

` IMPROVEMENT 1N MACHINES Pon entraine Tnt: correas oF'MowINe-Mncnmns.

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TQ ALL WHOM IT MAY CON-CERN: t

Be it known that we, GEORGE P. YORK andWlLLrM WILSON, ofiWestfield, inthe county of Chautauqua, and State of New York, have Yinvented a newand useful improvement' in Machines for Grinding the Cutters ofBlowing-Machines; and Wedo hereby declare that the following is a full,clear, and exact-description thereof, whichwill enable others skilled inthe art to make and use the same, reference bcingrhad to Vtheaccompanying drawings forming part of this specification, in which- IFigure 1 represents a front elevation of our improved'machine, with apartbroken away. Figure 2 represents' a plan viewof the same. 'i Similarletters of reference indicate,corresponding'parts.

reaping-machines may be readily adjusted and held inadj ustable guidesand supports, to be accurately presented to the grinding-wheel, forgrinding the same, no vmatteiof what pattern or angle they may be.

To this end our invention consists in the arrangement, upon a'suitablebench, adapted to hold a cuttelybar,

The object ofthisivcntion is to provide a simple andieheapniachirieLwhei-eon the cutter'barsofmowing or' of'a grindstone, providedwith mechanism for communicating a lateral motion of the same to andfrom the cutterhar, and of a table, also provided with means for movingto or from the stone ;A also, in anarrangement ofposts andganges,whereby the cutters are presented to the stone at the proper angle;also, in the combination, with the said posts, of gauges, whereby theproper position of lthe cutter, with relation to 'the stone, isdetermined; also, in an improvementin the construction of the said postsand gauges.

In the drawings, A represents the frame,'provided with a table, andsuitable bearings, for the support of' the shaft C of the stone, D,which isarranged to slide lengthwise thereon. i f i E represents.a-collar,.madefast to the saidshaft, between which, andthe .innerbearing of the shaft, a

suitable spi-ing, E, is arranged to bear against the said collar,tthetendency of which iste constantly bear the shaft in the direction of thecrank'. Y

G represents a loose collar, arranged on the sha-ft,von'the oppositeside of the collar E, which is connected, through the bell-crank withthe treadle I, whereby the shaft may be moved in the opposite direction.Y v

'The table B may lalso be fixed upon ways, as shown at K, and in likemanner connected with a treadle-or any other suitable means for movingit to and fr omthe stone,y and both may be moved together, or eithersepa rately, as desired` wm I L and L1 represent posts, secured to thetable by bolts L2, in a manner to be adjusted to'or from the side ci'the stone, and axially on the said bolts. Theupper extension of the saidposts is suitably in'clined'tewards the face of the stone, and vprovidedwithwood or soft-metal facings, M, to prevent injury to the edges of thecutters, which are liable to be inadvertently exposed to'contac't withthem. p

Near the top of the upright portion of the posts are adjustably xedthereto the gauges M, whicha'e also provided with weed or soft-metalfacings M2, which are intended, by action upon the edge of the cutters,toY determine'thelengthwise movement of the cutter-bar. -i

N' and N represent guides, which are also securedradjustably'to thetable, which are intendedlto hold the cutter-bar at the proper angle,with refereneetorthc acetot' the stone, to permitthe latter to bear fairupon the bevelled edges of the cutters when in position to be ground,and through which the cutter-bar may slide tobring the'edges oftheseveral cutters to the'position to be acted `on by the stone. i l

To grind the cutters of a mowingmachine,'the cutter-bar is placed in theguides N, between the post L and the stone, 'with the'points ofthecutters upward. Ilheguides N are thenl adjusted to hold the cutter-bar',so that when the cutters stand at aboutthe same angle vertically, as the'face of the upright part of the post Igiene edge ofthe cutters'willIstand in vertical planes parallel with the grinding-face ofthe stone.v-The post L isthen adjusted to agree with Vthe cutter-lianes clearlyshown in fig. 1. Infthis'position 'the cutter-bar is maintained by thehand,4 untih'by the action of the foot lon the treadle, 'the stoneis'moved up to the edge of the cutter,` the latterhaving beenadjusted-tothe proper position lengthwise-of the bar, as determined bythe gauge M1, the

face of which is bevelled, toagree with the edge of the cutters, whenthe grinding may be proceeded with.v When the` cutter has'beensuliiciently ground, and the foot removed from thetreadle, the stonewill' be removed from contact with the same, and 'outof the way of themovement of'the cutter-bar, in a lengthwise direction, which. is done tobring the corresponding edge ofthe next cutter into position to beground, andthe-saine operation may be continued till all the cutters areground on the, same edge.' The cutter-bar is then 'removed from theguides N N, to those marked N N', whichibeur the same relation tothestone on the other sideof theaxs, and whereby the other edges of thecutters may, in like manner, be ground, as willA be readily understood.i After the gauges and posts have been adjusted, they do not require tobe changed, so long as cutters ofthe same pattern are to be ground. v i

Having thus described our invention, we claim as new, and desire tosecure bylietters Patent- 1. The combination, with a table provided withmeans for holding a cutter-bar, as described, ofv a grindingwheel,arranged to slide laterally, substantially as and for the purposedescribed. v I I 2. The combination, with the posts L and L?, of thegauges M1, substantially as and for the purpose described. '3. Thecombination, with cutter-grindingapparatus, of the posts and gauges,provided withthe fucingsotA wood or other soft material, substantiallyas'and forthe purpose described. y

i 4. The combination, with a grinding-stone provided )vith means foreffecting a lateral movement thereof,

-ofthe-guidcsand posts, substantially as and for the purpose described.-

' GEO.- P.. YORK,

' VMVH'. WILSON. Witnesses:

A. B. Huur, N. A. WILsoN.

